"I have decided to retire from Formula One at the end of the season, although I am still able to compete with the best drivers of the world. This is something that makes me proud, and this is part of why I never regretted my comeback. I can be happy with my performance and the fact that I was continuously raising my game during the last three years. But then, at some point it is time to say good-bye.”

They were all worthy winners, and it was a show we won't soon forget. Head to Autoweek.com and check out the Oct. 15 issue of Autoweek magazine.

Let's shift gears to trucks. Big trucks. The next-generation Silverado is being tested on the roads of the General Motors Proving Ground northwest of Detroit. The company even released this teaser shot. The new Chevy arrives in 2013. GM said this week the truck is in its final stages of validation.